Petty Officer 3rd Class Derek Williams, a health services technician with Health, Safety and Work-Life Field Office's Rockmore King Clinic, performs an ultrasound on Petty Officer 2nd Class Charity Washko's shoulder Oct. 8 at the clinic and sees on average 10 to 15 physical therapy patients in a day. Williams has been in the Coast Guard for four years, is a native of Yucaipa, Calif., and recently received his physical therapy assistant degree from Pueblo Community College in Pueblo, Colo.